Seiko Cal. 6390 - 921

The Seiko 6390-921 represents an important milestone in Seiko's 1986 lineup. Powered by the 6390 caliber with 26j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-a288b46c494d]

Also known as: Tuna, Crown

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1986

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